What must be linked to the Row Iterator widget to enable addition and removal of items in a List View?

The Row Iterator widget is specifically designed to facilitate the addition and removal of items in a List View by being linked to an iterator buttons widget. The iterator buttons widget provides the necessary UI controls, such as buttons for adding or removing rows in the List View, and manages the interactions necessary to edit the underlying data structure. This linkage allows users to seamlessly modify the list, making it more dynamic and user-friendly.

When working with list views in Guidewire, it is crucial to have proper controls in place that can trigger actions for adding or removing items. The iterator buttons widget fulfills this role, ensuring users have an intuitive way to manipulate the data displayed in the List View.

Other elements like a form component, validation rules set, or a data source, while important in the overall context of data handling, do not directly facilitate the add/remove functionality of the Row Iterator itself. They support the broader functionality of the application but do not specifically provide the action buttons needed for direct interaction with the items in a List View.